HTC Desire 820 is now finally getting the Matsushita Android Marshmallow update. This
The Marshmallow update brings the Android version to 6.0.1 making it Android Marshmallow. The software version has been updated to 3.17.720.3 . With this software update, the HTC Sense version had been moved up to HTC Sense 7.0. The update comes in stages. So you need to be patient to download the update. You can manually check also for the update. The updates brings beauty of Android Marshmallow which includes Google Now on tap, Battery saving, Doze mode, App permissions etc.